& Analysis: Metals & Solutions Prior to Reaction Post Reaction Analysis Aluminum & Copper (II) Chloride -Blue translucent liquid -Small silver ball -Grew ten times original size -Rust Color -Clear transparent liquid A buildup of residue formed and the clear solution became cloudy with flaky matter. Iron & Magnesium Chloride -Clear transparent liquid -Silver nail - No Reaction -No reaction Zinc & Lead (II) Nitrate -Clear transparent liquid -Silver
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Making Molar Solutions and Dilutions Objectives: After performing this lab‚ the student should be able to: • Calculate grams of solute and correctly prepare a molar solution. • Prepare parallel and serial dilutions using C1V1 = C2V2 • Distinguish a parallel dilution from a serial dilution. • Determine whether a parallel or serial dilution should be used in a given situation. • Use a microcentrifuge to make a pellet. Making Molar Solutions and Dilutions A major job of any biotechnician
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Mario Troncoso 20025019 Dehydrating Cyclohexanol Structure/MSDS: Anhydrous calcium chloride—irritant and hygroscopic (calcium chloride) cyclohexanol—irritant and hygroscopic (cyclohexanol) cyclohexene—flammable and irritant (cyclohexene) Sulfuric acid—toxic and oxidizer (Sulfuric acid) phosphoric acid—corrosive (phosphoric acid) Results/Data: End product weighed 0.109g of cyclohexane and tested positive with bromine test Discussion: In order to perform
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Write up for Qualitative Analysis 1. Introduction- This experiment is for qualitative analysis so we are trying to find out what is in a substance. In this case we are using the flame test to try and discover what is in 4 unknown sample solutions that we have been given this is done by cross referencing the colour of the flame with 6 known solutions we test beforehand. Aim- In this experiment we are attempting to distinguish what substances are in the 4 unknown solutions by cross referencing
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freshwaters • Define where freshwaters lie on a spectrum of increasing concentrations of dissolved constituents in water. • On average‚ which ions are most prevalent in freshwaters (in comparison with sea water): sodium‚ chloride‚ calcium‚ bicarbonate? • What are hypersaline lakes? Describe their variable compositions. • In what units are constituents in freshwater measured as compared with seawater: grams per litre or milligrams per litre? • Geological
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Surname Centre No. Initial(s) Paper Reference 4 3 3 5 Candidate No. 2 H Signature Paper Reference(s) 4335/2H Examiner’s use only London Examinations IGCSE Team Leader’s use only Chemistry Paper 2H Higher Tier Tuesday 6 November 2007 – Morning Time: 2 hours Question Leave Number Blank 1 2 3 4 5 Materials required for examination Nil Items included with question papers Nil 6 7 8 9 Instructions to Candidates In the boxes above‚ write your centre number‚ candidate number‚ your surname
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Therefore‚ the other product is ammonium oxide. The fourth reaction occurred between calcium carbonate and hydrochloric acid. When mixed‚ the two reactants produced a clear aqueous solution‚ calcium chloride‚ water‚ and a gas. The gas was concluded to be carbon dioxide‚ since the wood splint was extinguished after it was exposed to the gas in the test tube. In the fifth reaction‚ the two reactants‚ copper(II) chloride and zinc produced a permanent color change in the solid substance in the aqueous solution
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determine the characteristic colors produced by certain metallic ions when vaporized in a flame and identify unknown metallic ions by means of their flame tests. Materials •Barium Chloride •Calcium Chloride •Cupric Chloride •Lithium Chloride •Potassium Chloride •Sodium Chloride •Strontium Chloride •Bunsen burner •Flint striker •Wooden splints •Goggles Procedure 1. Prepare the Bunsen burner as discussed in class. 2.
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composition of each substance in a salt mixture To better understand the concepts‚ we look at the reaction below. The reaction of sodium carbonate and calcium chloride is an aqueous system. The molecular form of the equation is Na2CO3.H2O + CaCl2.2H2O → CaCO3 + 2NaCl + 3H2O As the two reactant salts and sodium chloride are soluble in water but calcium carbonate is insoluble‚ the ionic equation for the reaction is that we present only the ions that react (after removing the spectator ions)we have
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In this particular situation we didn’t add enough PGLO into the DNA so ours didn’t glow. In the control lab a different outcomes was observed in each of the four plates. In the LB/amp/arabinose agarose plate containing the +pGLO sample‚ fluorescent green colonies developed. This is because the gene which codes for the fluorescent protein‚ GFP‚ is located near the beta lactamase gene on the pGLO plasmid‚ which protects bacteria from the antibiotic ampicillin. When the cell produced beta lactamase
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